CN107241809A - Demodulation reference signal processing and device - Google Patents
Demodulation reference signal processing and device Download PDFInfo
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- CN107241809A CN107241809A CN201610182881.2A CN201610182881A CN107241809A CN 107241809 A CN107241809 A CN 107241809A CN 201610182881 A CN201610182881 A CN 201610182881A CN 107241809 A CN107241809 A CN 107241809A
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- 238000012545 processing Methods 0.000 title claims abstract description 14
- 238000001228 spectrum Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000013507 mapping Methods 0.000 claims description 24
- 125000004122 cyclic group Chemical group 0.000 claims description 14
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003672 processing method Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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Abstract
The invention discloses demodulation reference signal processing and device, this method includes：Generate demodulated reference signal DMRS sequence symbols；Use length to carry out L times for L orthogonal mask sequence pair DMRS sequence symbols to spread, wherein, L is more than 2；Resource impact is carried out to the sequence symbol that spread spectrum is obtained.The problem of DMRS in the prior art can not meet the more uplink users of scheduling or data is solved by the present invention, so as to more be dispatched.
Description
Technical field
The present invention relates to communication field, in particular to demodulation reference signal processing and device.
Background technology
At third generation partner program (3rd Generation Partnership Project, referred to as 3GPP)
The PUSCH DMRS of R10 editions support multi-antenna ports, comprising between the PUSCH DMRS that multiple antennas are supported by cyclic shift
Orthogonality；And increase OCC codes on the basis of cyclic shift, it is further ensured that orthogonal between user or between different layers
Property.
PUSCH demodulated reference signals are defined as：
M=0,1 herein, andAnd
For Zad-off Chu sequences, it carries out cyclic shift by a basic sequence and obtained, length
For
Cyclic shift α is α in one time slotλ=2 π ncs,λ/ 12, andHereIt is a broadcasted values, nPRSThe pseudo-random sequence c (i) determined by cell physics ID or DMRS virtual ID is provided.Included in uplink scheduling UL grant, its value is given in the following tableDetermined by DCI information, in each TTI
Change is once.
The PUSCH DMRS of table 1 cyclic shift
During PUSCH DMRS resource block mappings, normal cyclic prefix is located at l=3, as shown in Figure 3；Extended cyclic prefix position
In l=2.
As shown above, PUSCH DMRS at most ensure the orthogonality between two users, it is contemplated that extensive antenna array
The application and development of row, may dispatch more uplink users and data.Up DMRS can not meet above-mentioned needs.
The content of the invention
The invention provides demodulation reference signal processing and device, tune can not be met to solve DMRS in the prior art
The problem of spending more uplink users or data.
According to an aspect of the invention, there is provided a kind of demodulation reference signal processing, including：Generate demodulation reference
Signal DMRS sequence symbols；Use length DMRS sequence symbols described in L orthogonal mask sequence pair to carry out L times to spread, wherein,
L is more than 2；Resource impact is carried out to the sequence symbol that spread spectrum is obtained.
Further, generating the DMRS sequence symbols includes：Generating length isThe DMRS sequence symbols, institute
DMRS sequence symbols are stated to be expressed as
Further, the L=4, to the DMRS sequence symbols carry out L times spread including：The DMRS sequences are accorded with
Number 4 times of spread spectrums are carried out, the sequence identifier after spread spectrum is expressed as sequenceM=0,1,2,3 and
Further, carrying out resource impact to the sequence symbol that spread spectrum is obtained includes：The first two symbol in 4 continuous symbols
2 RE of first time slot in a subframe are mapped to, latter two symbol is mapped to 2 RE of second time slot in a subframe
Represented with following formula：
Further, carrying out resource impact to the sequence symbol that spread spectrum is obtained includes：Continuous Mappings are arrived
First time slot in one subframe, thenContinuous Mappings second time slot into a subframe；
Continuous Mappings first time slot into a subframe, thenWhen Continuous Mappings are into a subframe second
Gap is represented with following formula：
Further, cyclic shift field of the orthogonal mask sequence in UL grant is obtained.
Further, totally four kinds of the orthogonal mask sequence, four layers of orthogonal mask sequence is all identical；Or；It is described
Totally four kinds of orthogonal mask sequence, the orthogonal mask sequence that 1 layer 2 of 3 layer 4 of layer and layer is different, also, the orthogonal mask sequence of 1 layer 2 of layer
Identical, the orthogonal mask sequence that 3 layer 4 of layer is identical.
Further, the orthogonal mask sequence is as shown in the table：
Further, length L times of DMRS sequence symbols progress described in L orthogonal mask sequence pair is being used to spread it
Before, methods described also includes：Receive configured information；Wherein, the configured information is used to indicate to use length for L orthogonal mask
Sequence.
Further, in the case where the configured information indicates to use length to be spread for 2 orthogonal mask sequence,
According to the configured information, length is used to be spread for 2 orthogonal mask sequence.
According to another aspect of the present invention, a kind of demodulated reference signal processing unit is additionally provided, including：Generation module,
For generating demodulated reference signal DMRS sequence symbols；Spread spectrum module, for using length described in L orthogonal mask sequence pair
DMRS sequence symbols carry out L times and spread, wherein, L is more than 2；Mapping block, the sequence symbol for being obtained to spread spectrum carries out resource
Mapping.
By the present invention, using generation demodulated reference signal DMRS sequence symbols；Length is used for L orthogonal mask sequence
L times is carried out to DMRS sequence symbols to spread, wherein, L is more than 2；Resource impact is carried out to the sequence symbol that spread spectrum is obtained.By this
Invention solves the problem of DMRS in the prior art can not meet the more uplink users of scheduling or data, more so as to carry out
Scheduling.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of demodulation reference signal processing according to embodiments of the present invention；
Fig. 2 is the structured flowchart of demodulated reference signal processing unit according to embodiments of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of demodulation reference signal processing is provided in the present embodiment, and Fig. 1 is solution according to embodiments of the present invention
The flow chart of reference signal processing method is adjusted, as shown in figure 1, this method comprises the following steps：
Step S102, generates demodulated reference signal DMRS sequence symbols；
Step S104, uses length to carry out L times for L orthogonal mask sequence pair DMRS sequence symbols and spreads, wherein, L is big
In 2；
Step S106, resource impact is carried out to the sequence symbol that spread spectrum is obtained.
The longer orthogonal mask sequence of length is employed by above-mentioned steps to be spread, so as to solve in the prior art
The problem of DMRS can not meet the more uplink users of scheduling or data, so as to more be dispatched.
As an optional embodiment, generation DMRS sequence symbols include：Generating length isDMRS sequences
Symbol, DMRS sequence symbols are expressed as
As an optional embodiment, L=4, DMRS sequence symbols are carried out L times spread including：To DMRS sequences
The sequence identifier that symbol carries out after 4 times of spread spectrums, spread spectrum is expressed as sequenceM=0,1,2,3 and
As an optional embodiment, carrying out resource impact to the sequence symbol that spread spectrum is obtained includes：4 continuous symbols
The first two symbol is mapped to 2 RE of first time slot in a subframe in number, and latter two symbol is mapped in a subframe
2 RE of two time slots are represented with following formula：
As an optional embodiment, carrying out resource impact to the sequence symbol that spread spectrum is obtained includes：
Continuous Mappings first time slot into a subframe, thenWhen Continuous Mappings are into a subframe second
Gap；Continuous Mappings first time slot into a subframe, thenContinuous Mappings are to one
Second time slot is represented with following formula in individual subframe：
As an optional embodiment, cyclic shift field of the orthogonal mask sequence in UL grant is obtained.
As an optional embodiment, totally four kinds of orthogonal mask sequence, four layers of orthogonal mask sequence is all identical；
Or；Totally four kinds of orthogonal mask sequence, the orthogonal mask sequence that 1 layer 2 of 3 layer 4 of layer and layer is different, also, the orthogonal of 1 layer 2 of layer is covered
Code sequence is identical, and the orthogonal mask sequence that 3 layer 4 of layer is identical.
As an optional embodiment, orthogonal mask sequence is as shown in the table：
As an optional embodiment, orthogonal mask sequence pair DMRS sequence symbol progress L of the length for L is being used
Before spreading again, method also includes：Receive configured information；Wherein, configured information is used to indicate to use length for L orthogonal mask
Sequence.
As an optional embodiment, indicate to use length for 2 orthogonal mask sequence to be expanded in configured information
In the case of frequency, according to configured information, length is used to be spread for 2 orthogonal mask sequence.
In the present embodiment, a kind of demodulated reference signal processing unit is additionally provided, Fig. 2 is according to embodiments of the present invention
The structured flowchart of demodulated reference signal processing unit, as shown in Fig. 2 the device includes：Generation module 22, for generating demodulation ginseng
Examine signal DMRS sequence symbols；Spread spectrum module 24, for using length DMRS sequence symbols described in L orthogonal mask sequence pair
L times is carried out to spread, wherein, L is more than 2；Mapping block 26, the sequence symbol for being obtained to spread spectrum carries out resource impact.
Illustrated with reference to an alternative embodiment.
The present embodiment proposes a kind of sending method for supporting more orthogonal up DMRS.Notify up by high-level signaling
PUSCH DMRS use the orthogonal mask sequence that length is 4 for 2 orthogonal mask sequence or length, are represented simply as OCC2
Or OCC4；
If OCC2, then carried out according to existing protocol
If OCC4, then there is following proposal.
PUSCH DMRS sequence symbols are generated, its length isIt is expressed as
Four times of spread spectrums are carried out using OCC4, now sequence table is shown asM=0,1,2,3 and
The first two symbol is mapped to 2 RE of first time slot in a subframe in 4 continuous symbols, and latter two symbol reflects
2 RE for being mapped to second time slot in a subframe are represented (example 1) with following formula：
Another mapping method is (example 2)：
Continuous Mappings first time slot into a subframe, thenContinuous Mappings are arrived
Second time slot in one subframe；Continuous Mappings first time slot into a subframe, then
Continuous Mappings second time slot into a subframe is represented with following formula：
Assuming that DMRS sequence
Sequence after being multiplied with spreading code is { a1, a2, a3, a4, b1, b2, b3, b4 ..., f1, f2, f3, f4 }, above-mentioned
The mapping of example 1 and example 2 is respectively as shown in Fig. 3 Fig. 4.
Above-mentioned w(λ)The Cyclic Shift that spreading code (also referred to as OCC codes, or orthogonal mask) is still depended in UL grant
Field (cyclic shift field), is defined as follows table, comprising：
The OCC codes of totally four kinds of ' four layer are all identical ' configuration
Totally four kinds ' the OCC codes that 1 layer 2 of 3 layer 4 of layer and layer are different, and the OCC code-phases of 1 layer 2 of layer are same, the OCC code-phases that 3 layer 4 of layer
Configuration together '
In the present embodiment, PUSCH DMRS formation sequences shorten to original half, are spread using four times, the money after spread spectrum
Source employs preferably mapping method, and OCC codes depend on current cyclic shift index, pair that OCC codes are indexed with cyclic shift
It should be related to (no sequencing).
By the present embodiment as a result of four times of spreading codes, four orthogonal DMRS are realized, are enabled a system to while scheduling 4
Individual upstream data.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
1. a kind of demodulation reference signal processing, it is characterised in that including：
Generate demodulated reference signal DMRS sequence symbols；
Use length DMRS sequence symbols described in L orthogonal mask sequence pair to carry out L times to spread, wherein, L is more than 2；
Resource impact is carried out to the sequence symbol that spread spectrum is obtained.
2. according to the method described in claim 1, it is characterised in that the generation DMRS sequence symbols include：
Generating length isThe DMRS sequence symbols, the DMRS sequence symbols are expressed as
3. method according to claim 2, it is characterised in that the L=4, carries out L times to the DMRS sequence symbols and expands
Frequency includes：
The sequence identifier after 4 times of spread spectrums, spread spectrum is carried out to the DMRS sequence symbols to be expressed as sequencem
=0,1,2,3 and
4. method according to claim 3, it is characterised in that resource impact bag is carried out to the sequence symbol that spread spectrum is obtained
Include：
The first two symbol is mapped to 2 RE of first time slot in a subframe in 4 continuous symbols, and latter two symbol is mapped to
2 RE of second time slot are represented with following formula in one subframe：
5. method according to claim 3, it is characterised in that resource impact bag is carried out to the sequence symbol that spread spectrum is obtained
Include：
Continuous Mappings first time slot into a subframe, thenContinuous Mappings are to one
Second time slot in individual subframe；Continuous Mappings first time slot into a subframe, then
Continuous Mappings second time slot into a subframe is represented with following formula：
6. method according to any one of claim 1 to 5, it is characterised in that the orthogonal mask sequence is according to UL
Cyclic shift field in grant is obtained.
7. method according to claim 6, it is characterised in that the orthogonal of totally four kinds, four layers of the orthogonal mask sequence is covered
Code sequence is all identical；Or；Totally four kinds of the orthogonal mask sequence, the orthogonal mask sequence that 1 layer 2 of 3 layer 4 of layer and layer is different,
Also, the orthogonal mask sequence that 1 layer 2 of layer is identical, the orthogonal mask sequence that 3 layer 4 of layer is identical.
8. method according to claim 7, it is characterised in that the orthogonal mask sequence is as shown in the table：
9. method according to any one of claim 1 to 5, it is characterised in that using orthogonal mask sequence of the length for L
Row to the DMRS sequence symbols carry out L times spread before, methods described also includes：
Receive configured information；Wherein, the configured information is used to indicate to use length for L orthogonal mask sequence.
10. method according to claim 9, it is characterised in that the configured information indicate to use length for 2 it is orthogonal
In the case that mask code sequence is spread, according to the configured information, length is used to be spread for 2 orthogonal mask sequence.
11. a kind of demodulated reference signal processing unit, it is characterised in that including：
Generation module, for generating demodulated reference signal DMRS sequence symbols；
Spread spectrum module, spreads for using length DMRS sequence symbols described in L orthogonal mask sequence pair to carry out L times, wherein,
L is more than 2；
Mapping block, the sequence symbol for being obtained to spread spectrum carries out resource impact.
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| CN201610182881.2A CN107241809A (en) | 2016-03-28 | 2016-03-28 | Demodulation reference signal processing and device |
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| CN201610182881.2A CN107241809A (en) | 2016-03-28 | 2016-03-28 | Demodulation reference signal processing and device |
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Cited By (3)
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| CN110418411A (en) * | 2018-04-27 | 2019-11-05 | 维沃移动通信有限公司 | Indication method, device and network equipment of DMRS |
| WO2020143757A1 (en) * | 2019-01-11 | 2020-07-16 | Mediatek Inc. | Ue multiplexing for dmrs transmission |
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